Crosby IPBC Manual De Usuario página 5

The pivot and the camsegment are the most critical parts in the clamp and require extra
attention during inspection. Ensure in any event for good light during inspection. Observe
the following rules during every inspection:
EN
Reject when the sharpness of one ring has disappeared for 50% or more.
Pivot(s):
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Camsegment: Reject when the sharpness of one tooth is compromised for 50% or more.
This type of clamp can prone to deformation of the hole in which the chain (D-shackle)
impinges, resulting in the hole becoming oval. When that is the case the clamp should
be removed from service immediately. Deformation in this part is mainly due to
exceeding of the maximum side loading angle of 15°. The maximum loading angles are
displayed in the the loading diagram 1.
Some illustrations have been included on the inside of the front cover of damaged and
worn (rejected) pivots and camsegments with explanations. In most cases however the
areas of damage are much less extensive. In doubtful cases an authorised repairer
should assess the clamp.
1.3 how to operate the clamp
IPBC lifting clamps are suitable for the horizontal lifting and transport of one or more
steel plates, beams and structures as well as tilting beams from position H
to position I.
See illustrations 3-11 for part reference.
lifting:
1. Open the clamp by pulling up the grip on the camsegment (B) (3).
2. Place the clamp securely on the material to be lifted, so that the jaw of the clamp
rests against the plate or flange (E). Keep base against the load (4).
3. Close the clamp by letting go the grip. The clamp will remain on the material in
pretensioned position, allowing lifting to commence (5).
4. As soon as the load is at its destination let the crane hook descend until the clamp
is fully free of load, meaning that the lifting chain is no longer taut.
5. The clamp can now be removed from the load by pulling up the camsegment (B)
again. The clamp may now be used again immediately or put away in opened
position (6).
tilting:
1. Open the clamp by pulling up the grip on the camsegment (B) (7).
2. Place the clamp securely on the material to be lifted, so that the jaw of the clamp
rests against the plate or flange (E). Keep base against the load (8).
Copyright © 2013 The Crosby Group LLC. All Rights Reserved.
3. Close the clamp by letting go the grip. The clamp will remain on the material in
pretensioned position, allowing tilting to commence (9).
4. Pull gently the chain taut. By continuing the lifting, the clamp will tilt over to point
R. At a certain moment the beam will tip to the I-position (10).
5. As soon as the load is at its destination let the crane hook descend until the clamp
is fully free of load, meaning that the lifting chain is no longer taut.
6. The clamp can now be removed from the load by pulling up the camsegment (B)
again. The clamp may now be used again immediately or put away in opened
position (11).
1.4 A reliable clamp, a secure basis for lifting
10 year warranty preventive maintenance procedure:
Parts should be replaced only when they no longer meet our standards.
10 year warranty repair procedure:
During every repair service the most critical parts, being pivot(s), camsegment and
spring will be replaced and, when necessary, any rejected parts will be replaced.
Please consult www.crosbyip.com/warranty for more information on maintenance
procedures.
Maintenance without 10 year warranty: Annually clamps are subjected to inspection*
and parts will be replaced only when they no longer meet our standards.
*CrosbyIP authorised repairer
Copyright © 2013 The Crosby Group LLC. All Rights Reserved.
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